Definition of hard-burnt in US English:

hard-burnt

adjective

  • Made hard by burning or firing; (of clay, earthenware, etc.) that has received sufficient firing to produce vitrification; fired at a high temperature so as to increase hardness.

Origin

Mid 17th century; earliest use found in Joshua Poole (c1615–c1656), schoolmaster and author. From hard + burnt.

Pronunciation

hard-burnt

/ˈhɑːdbəːnt/